Friction-grip for ropeway-trucks.



vNo. 828,190. PATENTBD AUG. 7, 1906. s. 'GARLSON &. R. PQPBTTERSSON. I

FRICTION GRIP FOR ROPBWAY TRUCKS.

APPLIOATIOR FILED APB- 29.1904.

THI NORRI! rn'lls 0a., wAsHmaroAL-m t.

SVEN CARLSON,

OF STOOKHOLM, AND RICHARD PETRUS PETTERSSON,

OF FALUN, SWEDEN.

FRICTION-GRIP FOR ROPEWAY-TRUGKS.

Specification of Letters Patent.

Patented Aug. 7, 1906.

Application filed April 29, 19(14. Serial No. 205,493.

To all whom it may concern.-

Be it known that we, SVEN CARLSON, residing at Stockholm, and RICHARDPETRUs PETTERSSONJeSiding at Falun, Sweden, subjects of the King ofSweden, have invented an Improvement in Friction-Grips forRopeway-Trucks, of which the following is a specification.

Our invention relates to friction-grips forropeway-trucks and'the objectthereof is the utilization of the weight of the load through novel meansto effect a gripping force to enage a traveling cable and therebyconnect the truck for transporting the load.

In carrying out our invention we employ, together with a suitable frameand the rollers or trolleys mounted therein and which run upon astationary track or cable, a gripper, a device to which the load issecured,- and devices intermediate of the gripper and the aforesaiddevice and associated therewith and by which the weight of the load isutilized to actuate the gripper and effect a gripping force against atraveling cable for the movement of the load, all of which will behereinafter more particularly described.

In the drawings, Figure 1 is an end elevation and partial sectionillustrating a structure embodying our improved friction-grip. Fig. 2 isa side elevation of the same. Fig. 3 is an end elevation and partialsection of a modified form of gripper, and Fig. 4 is a side elevation ofthe same.

Referring to Figs. 1 and 2, (1 represents the rollers or trolleys, whichare revolubly mounted in a suitable frame comprising the side plates band any suitable spacing members therefor. c is a hanger orsuspension-bar to which the bracket or other device for engaging orreceiving the load to be conveyed is directly connected. At one end thehan er 0 is pivotally connected to a pin or journaI d, which is integralwith or secured in a crankarm e. The shaft f of the crank-arm e isscrew-threaded at its outer end and adapted to engage a nut or cap 9, towhich is secured the movable member h of agripper adapted to engage atraveling cable. The movable member h of the gripper is slidably mountedon the casing forming the journal of the crank-shaft f, and this casingis connected to one of the side plates 1), which, as shown, may beextended, and inte ral with this casing is the stationary mem er '5 ofthe gripper.

The extended plate I) is provided with a suitable opening 8 in which thecrank-arm e operates. In this form of the invention it will now beapparent that the weight of the load attached to the hanger c isutilized through the hanger a, pin (1, crank-arm e to turn thecrank-shaft f, and thereby to move the nut g and movable member h of themeans of the screw-threaded end of the crank-shaft to bind the travelingcable, and, moreover, that the hanger and load may be raisedindependently ofthe trolley-frame to open the gripper and release thetraveling cable.

In Figs. 3 and 4, wherein the preferred form of our invention isillustrated, the crank-arm e is placed between the side plates 1) of theframe in which the rollers a are mounted, and the crank-shafts f arejournaled in the plates 12. One of the plates 1) is provided with asuitable opening 8, through which the pin cl extends, this pin (1 beingsecured to one end of the hanger c and also being pivotally secured inthe outer end of the crank-arm e. Concentrically with its bearing-pointsand on one side the crank-arm is provided with a screw-threaded openingin which is received the screw-threaded end of the spindle f of themovable member h of the gripper, the stationary member i of the gripperbeing secured to one of the side plates 1) in any desired manner. Inthis form the crank-arm is moved by the weight of the load throu h thehanger c and in turn moves the spin le f to actuate the gripper to bindthe cable, and, as shown, a suitable roller may be mounted upon abearing secured to the hanger c beneath the trolle -frame and caused torun up onto a suitab e rail to raise the hanger and load, move thegripper in the opposite direction, and release the traveling cable.

It will now be apparent that in the structures of our improved r'pperherein disclosed the weight of the oad is at all times during thetransmission thereof the main factor creating and determinin thegripping pressure upon the travelin cab e, and, moreover, that with agiven oad the grippin force exerted is practically constant at afi timesduring the travel of the load.

We claim as our invention- 1. In a friction-grip, the combination with atraveling frame and rollers mounted theregripper by f in, of ascrew-spindle, a movable jaw to which I a right-line reciprocatingmovement is imparted by the said screw-spindle, a fixed jaw and meansfor actuating the said screw spindle and to which the load is directlyconnected for support.

2. In a friction-grip, the combination with a traveling frame androllers mounted therein, of a screw-spindle, a movable jaw to which aright-line reciprocating movement is imparted by the said screw-spindle,a fixed jaw, a crank coacting with the said screw-spindle and an armpivotally hung from the said crank and to which the load is directlycon- I pivotal bearings of the crank-arm, a jaw fixed on the saidspindle, a jaw fixed on the said frame, a hanger pivot-ally connected tothe said crank-arm and to which the load is directly connected, andmeans for raising said hanger and load.

5. A friction-grip, comprising a frame, rollers mounted therein, acrank-arm pivotally mounted between the members of said ame, ascrew-threaded spindle operating in a screw-threaded opening concentricwith the pivotal bearin s of the crank-arm, a jaw fixed on said spindle,a jaw fixed on the said frame, a hanger pivotally connected to thenected for support. said crank-arm and to which the load is 3. In afriction-grip, the combination with a frame and rollers mounted therein,.of .a crank-arm, a screw-spindle actuated thereby, a gripping-jawintegral with the said screwsplndle, a ed jaw, a hanger to which the Iload is attached and a direct connection between the said crank-arm andhanger. l

4. A friction-grip, comprising a frame, rollers mounted therein, acrank-arm pivotally mounted between the members of said i ame, ascrew-threaded spindle operating in a screw-threaded opening concentricwith the l which the said hanger and load may he raised.

In witness whereof we has 1e hereunto set our hands in the presence oftwo witnesses.

SVEN OARLSON. RICHARD PETRUS rnrrnnsson Witnesses GARL FRANO, FLEMINGGmLnn-sron'r.

